so you make a frame, get lots of bags of clay, and then you literally just manipulate that clay into the shape and form you want. in this case, an alien. it's painted then with special silicone paint. you can then set about doing effects. i got bits and bobs from the butchers. and interpreted what i could see from the pathology going on on the alien in the film as best i could. >> john even appears in the film. here he is holding the scalpel. >> i have to take the role of the american scientist pathologist from the original film. i just had to don a radiation outfit and cover myself. that's why you don't see my face in it. that's me doing the pathology. >> it was a work of pure genius. i'm very proud of it, but it is a restoration. >> the deception goes all the way to oh, okay, well, it was a hoax but now we'll make money telling you how the hoax was done. >> despite questions about the